What's the big noise of central air conditioner? How to deal with it?
The outdoor units of household central air conditioners can be installed on the basis of outdoor design or on the roof of independent residential buildings, which has little impact on neighbors and indoor noise. As for the confluent type (building, it can only be set on the open balcony or cantilever platform (except the top floor). Some installation personnel did not take any anti vibration measures, and directly placed the outdoor unit of the air conditioner on the outdoor open space (the base of the balcony or cantilever platform), or hung it on the wall through a simple shelf. When the machine was running, especially at night, it had a great impact on the indoor and neighbors. The noise generated not only affected users' use, but also affected neighbors' peace, resulting in neighborhood conflicts, As a result, complaints sometimes occur.
When stopping the device, the outdoor unit shall be located as close to the indoor unit as possible to shorten the refrigeration process pipeline and lower than the indoor unit as far as possible, with the height difference generally within 5000mm; If possible, the device should be placed on the ground, or on a fastening platform that will not produce noise, and a suspended spring pneumatic butterfly valve/rubber damper or strip rubber with a thickness of less than 10mm should be set under the base to ensure stable operation of the outdoor unit; In order to provide a good heat exchange condition for the outdoor unit heat exchanger, the air inlet and exhaust shall be smooth to prevent backflow, and a gap of more than 200mm shall be left at the side of the outdoor unit against the wall; When the ground lift device is installed on the street, the lowest part of the unit must be more than 2500 mm above the air, and cannot hinder the traffic and pedestrians; The hot (cold) air discharged from the outdoor unit shall not be directly directed to neighbors or passers-by at close intervals. If necessary, guide fence boards shall be set; In coastal areas where air pollution and acid rain are serious and the air contains more salt, sunshades should be set up without impeding air circulation in order to avoid corrosion of outdoor units and reduce the service life of air conditioners, as well as to prevent direct sunlight and improve the cooling effect of units; As for the upper device of the converging building, the drainage of the outdoor unit (defrosting water during heat pump operation), including the condensate of the indoor unit, should be connected to the centralized sewer of the building, so as not to affect the normal life downstairs and passers-by walking.

Brief introduction of precautions for installation of stainless steel pneumatic butterfly valve
Stainless steel pneumatic butterfly valve is a kind of pneumatic butterfly valve, which is mainly an important part of the important connecting pipeline. Stainless steel pneumatic butterfly valve can be seen everywhere in our daily life. The most common ones are pneumatic butterfly valves in the rain, cable protection pipes, etc. The products are widely used in our daily life. Generally, stainless steel pneumatic butterfly valves are very convenient to install, However, there are still some precautions for installation. Here are some precautions for installation of stainless steel pneumatic butterfly valve.
Attention to stainless steel pneumatic butterfly valve is as follows:
1. Stainless steel pneumatic butterfly valve should be installed with loose flange at one end
2. If welding process is required during installation, try to protect the surface of stainless steel pneumatic butterfly valve to some extent to prevent the welding machine from burning
3. It is forbidden to twist the stainless steel pneumatic butterfly valve during installation.
4. When installing stainless steel pneumatic butterfly valve, try not to fold or bend it.